Basically, he tried to blame porn. And after years of denial, began offering up more bodies in a bid to prolong his execution.
While it can't be held solely responsible, I don't know why some people have always been sceptical about porn being the initial catalyst to Bundy's murders. It's well known that many viewers of pornography need increasingly harder and more debasing material, in which their natural humanity and compassion goes right out the window.
